Denver International's 53 square miles of land makes it the largest airport in North The united states. Opened in 1995, the facility is loaded with modern features, including a 16,000-foot-long runway able to handling Airbus A380s.
Why It is Unique:
"There's not lots of ways to make money off the excess land," Schreckengast says, "unless you can become self-sufficient." The designers of this airport were hoping to do that, launching major green initiatives such as a 9200-panel solar farm. The airport says the solar farm produces three million kilowatt-hours of electricity per year, or about half the energy necessary to power the terminal for a year. Additionally, at the finish of 2009, the airport built another photovoltaic method that is responsible for powering the fuel-storage and distribution facility.